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Return Address:
City Clerk’s Office
City of Renton
1055 S Grady Way
Renton, WA 98057
DECLARATION OF COVENANT
FOR INSPECTION AND MAINTENANCE OF DRAINAGE FACILITIES AND
ON-SITE BMPS
Grantor:
Grantee: City of Renton, a Washington municipal corporation
Legal Description:
Assessor's Tax Parcel ID#:
IN CONSIDERATION of the approved City of Renton (check one of the following)
Residential Building Permit Commercial Building Permit
Clearing and Grading Permit Civil Construction or Utility Permit
for Permit(s)_____________________ (Construction/Building/Utility Permit #) relating to the real property
("Property") described above, the Grantor(s), the owner(s) in fee of that Property, hereby
covenants (covenant) with the City of Renton (“City of Renton” or “City”), a municipal corporation
of the state of Washington, that he/she (they) will observe, consent to, and abide by the conditions
and obligations set forth and described in Paragraphs 1 through 9 below with regard to the
Property, and hereby grants (grant) an easement as described in Paragraphs 2 and 3. Grantor(s)
hereby grants (grant), covenants (covenant), and agrees (agree) as follows:
1.The Grantor(s) or his/her (their) successors in interest and assigns ("Owners ") shall at their own
cost, operate, maintain, and keep in good repair, the Property's drainage facilities constructed
as required in the approved construction plans and specifications __________________ (Project
Plan #) on file with the City of Renton and submitted to the City of Renton for the review and
approval of permit(s) _____________________________ (Construction/Building/Utility Permit #). The
Property's drainage facilities are shown and/or listed on Exhibit A – Site Plan. The Property’s
drainage facilities shall be maintained in compliance with the operation and maintenance
schedule included and attached herein as Exhibit B – Operations and Maintenance. Drainage
facilities include pipes, channels, flow control facilities, water quality facilities, on-site best
management practices (BMPs) and other engineered structures designed to manage and/or
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treat stormwater on the Property. On-site BMPs include dispersion and infiltration devices,
bioretention, permeable pavements, rainwater harvesting systems, tree retention credit,
reduced impervious surface footprint, vegetated roofs and other measures designed to mimic
pre-developed hydrology and minimize stormwater runoff on the Property.
2.City of Renton shall have the right to ingress and egress over those portions of the Property
necessary to perform inspections of the stormwater facilities and BMPs and conduct
maintenance activities specified in this Declaration of Covenant and in accordance with the
Renton Municipal Code. City of Renton shall provide at least thirty (30) days’ written notice to
the Owners that entry on the Property is planned for the inspection of drainage facilities. After
the thirty (30) days, the Owners shall allow the City of Renton to enter for the sole purpose of
inspecting drainage facilities. In lieu of inspection by the City, the Owners may elect to engage
a licensed civil engineer registered in the state of Washington who has expertise in drainage to
inspect the drainage facilities and provide a written report describing their condition. If the
engineer option is chosen, the Owners shall provide written notice to the City of Renton within
fifteen (15) days of receiving the City’s notice of inspection. Within thirty (30) days of giving this
notice, the Owners, or engineer on behalf of the Owners, shall provide the engineer’s report to
the City of Renton. If the report is not provided in a timely manner as specified above, the City
of Renton may inspect the drainage facilities without further notice.
3.If City of Renton determines from its inspection, or from an engineer’s report provided in
accordance with Paragraph 2, that maintenance, repair, restoration, and/or mitigation work is
required to be done to any of the drainage facilities, City of Renton shall notify the Owners of
the specific maintenance, repair, restoration, and/or mitigation work (“Work”) required
pursuant to the Renton Municipal Code. The City shall also set a reasonable deadline for the
Owners to complete the Work, or to provide an engineer’s report that verifies completion of
the Work. After the deadline has passed, the Owners shall allow the City access to re-inspect
the drainage facilities unless an engineer’s report has been provided verifying completion of
the Work. If the Work is not completed within the time frame set by the City, the City may
initiate an enforcement action and/or perform the Work and hereby is given access to the
Property for such purposes. Written notice will be sent to the Owners stating the City’s
intention to perform such Work. This Work will not commence until at least seven (7) days after
such notice is mailed. If, within the sole discretion of the City, there exists an imminent or
present danger, the seven (7) day notice period will be waived and Work will begin
immediately.
4.The Owners shall assume all responsibility for the cost of any Work, or any measures taken by
the City to address conditions as described in Paragraph 3. Such responsibility shall include
reimbursement to the City within thirty (30) days of the receipt of the invoice for any such Work
performed. Overdue payments will require payment of interest at the maximum legal rate
allowed by RCW 19.52.020 (currently twelve percent (12%)). If the City initiates legal action to
enforce this agreement, the prevailing party in such action is entitled to recover reasonable
litigation costs and attorney’s fees.
5.The Owners are required to obtain written approval from City of Renton prior to filling, piping,
cutting, or removing vegetation (except in routine landscape maintenance) in open vegetated
stormwater facilities (such as swales, channels, ditches, ponds, etc.), or performing any
alterations or modifications to the drainage facilities referenced in this Declaration of Covenant.
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6.Any notice or consent required to be given or otherwise provided for by the provisions of this
Agreement shall be effective upon personal delivery, or three (3) days after mailing by Certified
Mail, return receipt requested.
7.With regard to the matters addressed herein, this agreement constitutes the entire agreement
between the parties, and supersedes all prior discussions, negotiations, and all agreements
whatsoever whether oral or written.
8.This Declaration of Covenant is intended to protect the value and desirability and promote
efficient and effective management of surface water drainage of the real property described
above, and shall inure to the benefit of all the citizens of the City of Renton and its successors
and assigns. This Declaration of Covenant shall run with the land and be binding upon
Grantor(s), and Grantor's(s') successors in interest, and assigns.
9.This Declaration of Covenant may be terminated by execution of a written agreement by the
Owners and the City that is recorded by King County in its real property records.
IN WITNESS WHEREOF, this Declaration of Covenant for the Inspection and Maintenance of
Drainage Facilities is executed this _____ day of ____________________, 20_____.
GRANTOR, owner of the Property GRANTOR, owner of the Property
STATE OF WASHINGTON )
COUNTY OF KING )ss.
On this day personally appeared before me:
, to me known to be the individual(s)
described in and who executed the within and foregoing instrument and acknowledged that they
signed the same as their free and voluntary act and deed, for the uses and purposes therein stated.
Given under my hand and official seal this _____ day of ___________________, 20_____.
Printed name
Notary Public in and for the State of
Washington, residing at
My appointment expires
1
2
3
n
SCALE: 1" = 40'S 21ST STSMITHERS AVE S
EXHIBIT "A"
LUA24-000081
SHOPHIE JO SHORT PLAT
Stormwater Facility Maintenance Program
PROPERTY ADDRESS
S 21st Street, Renton, WA 98055
PREPARED FOR
Schneider Homes, Inc.
6510 Southcenter Blvd, Suite100
Tukwila, WA 98188
PREPARED BY
ESM Consulting Engineers, LLC
33400 8th Avenue S, Suite 205
Federal Way, WA 98003
253.838.6113 tel
253.838.7104 fax
EXHIBIT B – Operations & Maintenance
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
TABLE OF CONTENTS
Vicinity Map
Site map
Maintenance and Source Control Manual
SECTION 1 – Project Description
SECTION 2 – Maintenance Importance and Intent
SECTION 3 – Responsible Parties
SECTION 4 – Facilities Requiring Maintenance
SECTION 5 – Maintenance Instructions
SECTION 6 – Vegetation Maintenance
SECTION 7 – Pollution Source Control Measures
SECTION 8 – Annual Cost of Maintenance
Appendices
APPENDIX I - Drainage System Maintenance Guide Forms
APPENDIX II - Manufacturer Maintenance Guide Forms
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
1. INTRODUCTION
This manual is prepared in conjunction with the Drainage Control Report (DCR) for the
site improvements.
This Storm Water Facility Maintenance (SWFM) Manual shall reside in the Facility
Manager’s office within the main building on the site. The SWFM Manual shall be
updated annually with the inspection reports as part of regular storm drainage
system maintenance activities. The SWFM Manual shall be made available to City
personnel for inspection at any time.
Project Description
Sophie Jo Short Plat is located at the southeast corner of the intersection between S
21st Street and Smithers Ave S in the City of Renton. The development includes 3 single
family lots, a joint use driveway tract used for a shared access between lots 2 and 3,
and a stormwater detention vault.
The drainage control management system consists of multiple collection basins,
conveyance pipes, and below ground detention system. All of these systems are
designed to control surface runoff from the site to reduce impacts on the environment
downstream of the site. “Drainage control” can be quality or quantity control and each
system requires consistent maintenance for proper operation. Descriptions of each of
the features and how they operate are provided below.
Refer to the site map for the site configuration and locations of storm drainage control
systems.
Site Ownership
Schneider Homes, Inc.
6510 Southcenter Blvd, Suite100
Tukwila, WA 98188
Permanent Stormwater Control System Description
The on-site stormwater control systems for quality and/or quantity control exist all
around the site.
A site plan showing the location of the drainage systems for the site is provided on the
following page.
Per Ecology TAPE approval, the owner shall have the system inspected for a minimum
of 12 months from start of post construction operation. Monthly inspection is required
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
in wet season from Oct - April 30 and every other month during the remaining dry
season. The inspection results shall be used to identify the initial min. maintenance
regiment required from site loading.
2. DRAINAGE FACILITIES MAINTENANCE
The importance of maintenance for the proper functioning of stormwater control
facilities cannot be over-emphasized. A substantial portion of failures (clogging of
filters, resuspension of sediments, loss of storage capacity, etc.) are due to
inadequate maintenance. Stormwater BMP maintenance is essential to ensure that
BMPs function as intended throughout their full life cycle.
The fundamental goals of maintenance activities are to ensure the entire flow
regime and treatment train designed for this site continue to fully function. For
this site these include:
• Maintain designed stormwater detention capacity.
• Maintain ability of storm facility to attenuate flow rates.
• Maintain ability to safely convey design stormwater flows.
• Maintain ability to treat stormwater runoff quality.
• Preserve soil and plant health, as well as stormwater flow contact with plant
and soil systems.
• Clearly identify systems so they can be protected.
• Keep maintenance costs low.
• Prevent large-scale or expensive stormwater system failures.
• Prevent water quality violations or damage to downstream properties.
The intent of this section and manual is to pass on to the responsible parties all the
information critical to understand the design of the system, risks and considerations
for proper use, suggestions for maintenance frequencies, and cost so that realistic
budgets can be established.
The overall drainage control systems will require the same maintenance on a regular,
annual basis in order to assure satisfactory performance throughout the year. Most
maintenance should be performed during the early summer to identify existing or
potential problems and allow repairs to be completed in time for the winter season. At
the conclusion of the maintenance, an Inspection Report should be completed and
stored with this Operation Manual as a record of maintenance activities.
3. RESPONSIBLE PARTIES
The parties responsible for maintenance will be the property ownership as listed above.
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
4. FACILITIES REQUIRING MAINTENANCE
Annual inspection of treatment and flow control system to be performed by a
qualifying/certified 3rd party trained in proper inspection and maintenance of these
systems. Annual inspection and maintenance reports to be provided to the City of
Renton to review and confirm compliance. Specific instructions for particular drainage
system feature maintenance is provided in Appendix I. The following drainage system
features are included:
Area Drains and Catch Basins – Area drains and catch basins serve two purposes on this
site, collect surface runoff in special locations, and allow pipes to connect and change
direction. Generally, they are low maintenance devices, but some minor attention to
them is necessary.
Conveyance Systems (Pipes, Ditches, Swales) - Conveyance systems are those features
that allow collected water to move reliably and safely around the site. For this project,
pipes are the main conveyance system. It should be obvious that any significant
blockage can and will present problems. Though easy to do, period inspection and
cleaning is necessary to keep water going to where it was intended on this site.
Detention System - The detention system for this site consists of a below ground
detention facility located under the shared access driveway.
If there are any questions or additional information is desired, please contact the City
of Renton.
City of Renton Public Works
1055 South Grady Way
Renton, Washington 98057
(206) 445-5924
5. MAINTENANCE INSTRUCTIONS
The parties responsible for maintenance must review and apply the maintenance
requirements contained herein.
These maintenance instructions outline conditions for determining if maintenance
actions are required, as identified through inspection. However, they are not intended
to be a measure of the facility’s required condition between inspections. Exceedance
of these conditions at any time between inspections or maintenance activity does not
automatically constitute a violation of these standards. However, based upon
inspection observations, the inspection and maintenance presented in the checklists
shall be adjusted to minimize the length of time that a facility is in a condition that
requires a maintenance action. For facilities not owned and maintained by the city, a
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
log of maintenance activity that indicates what actions were taken must be kept on site
and be available for inspection by the city.
A brief discussion for each stormwater facility and BMP is provided below. Example
Maintenance checklists for all stormwater facilities and BMPs are provided in
Appendix I and II.
Underground Detention (Checklist #1 & Appendix II)
Catch Basins (Checklist #2)
See Checklist #6
6. VEGETATION MAINTENANCE
Vegetation shall be maintained at a minimum to prevent debris and material from
entering the storm system.
7. POLLUTION SOURCE CONTROL MEASURES and MAINTENANCE GUIDANCE
Pollution source controls are actions taken by a person or business to reduce the amount
of pollution reaching surface and ground waters. Controls, also called “best
management practices” (BMP’s), include:
Altering the activity (e.g., substitute non-toxic products or recycle used oil)
Enclosing or covering the activity (e.g., building a roof)
Segregating the activity (e.g., diverting runoff away from an area that is
contaminated)
Routing runoff from the activity to a treatment alternative as allowed by the
City (e.g., to a wastewater treatment facility, sanitary sewer, or stormwater
treatment area).
Pollution source controls are needed because of the contamination found in the runoff
from commercial areas and the effects of this contamination on aquatic life and human
health. Research on urban runoff in the Puget Sound area and elsewhere has found oil
and grease, nutrients, organic substances, toxic metals, bacteria, viruses, and
sediments at unacceptable levels.
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
APPENDIX I
DRAINAGE SYSTEM MAINTENANCE GUIDE FORMS
NO. 4 – CONTROL STRUCTURE/FLOW RESTRICTOR
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITION WHEN MAINTENANCE
IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Structure Trash and debris Trash or debris of more than ½ cubic foot
which is located immediately in front of the
structure opening or is blocking capacity of the structure by more than 10%.
No Trash or debris blocking or potentially
blocking entrance to structure.
Trash or debris in the structure that
exceeds 1/3 the depth from the bottom of
basin to invert the lowest pipe into or out of the basin.
No trash or debris in the structure.
Deposits of garbage exceeding 1 cubic
foot in volume.
No condition present which would attract or
support the breeding of insects or rodents.
Sediment
accumulation
Sediment exceeds 60% of the depth from
the bottom of the structure to the invert of the lowest pipe into or out of the structure
or the bottom of the FROP-T section or is
within 6 inches of the invert of the lowest pipe into or out of the structure or the
bottom of the FROP-T section.
Sump of structure contains no sediment.
Damage to frame
and/or top slab
Corner of frame extends more than ¾ inch
past curb face into the street (If
applicable).
Frame is even with curb.
Top slab has holes larger than 2 square
inches or cracks wider than ¼ inch.
Top slab is free of holes and cracks.
Frame not sitting flush on top slab, i.e.,
separation of more than ¾ inch of the frame from the top slab.
Frame is sitting flush on top slab.
Cracks in walls or
bottom
Cracks wider than ½ inch and longer than
3 feet, any evidence of soil particles
entering structure through cracks, or maintenance person judges that structure
is unsound.
Structure is sealed and structurally sound.
Cracks wider than ½ inch and longer than
1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering
structure through cracks.
No cracks more than 1/4 inch wide at the
joint of inlet/outlet pipe.
Settlement/
misalignment
Structure has settled more than 1 inch or
has rotated more than 2 inches out of
alignment.
Basin replaced or repaired to design
standards.
Damaged pipe joints Cracks wider than ½-inch at the joint of the
inlet/outlet pipes or any evidence of soil
entering the structure at the joint of the
inlet/outlet pipes.
No cracks more than ¼-inch wide at the
joint of inlet/outlet pipes.
Contaminants and
pollution
Any evidence of contaminants or pollution
such as oil, gasoline, concrete slurries or
paint.
Materials removed and disposed of
according to applicable regulations. Source
control BMPs implemented if appropriate.
No contaminants present other than a surface oil film.
Ladder rungs missing
or unsafe
Ladder is unsafe due to missing rungs,
misalignment, rust, cracks, or sharp edges.
Ladder meets design standards and allows
maintenance person safe access.
FROP-T Section Damaged FROP-T T section is not securely attached to structure wall and outlet pipe structure should support at least 1,000 lbs of up or
down pressure.
T section securely attached to wall and outlet pipe.
Structure is not in upright position (allow up
to 10% from plumb).
Structure in correct position.
NO. 4 – CONTROL STRUCTURE/FLOW RESTRICTOR
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITION WHEN MAINTENANCE
IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
FROP-T Section
(cont.)
Damaged FROP-T
(cont.)
Connections to outlet pipe are not
watertight or show signs of deteriorated
grout.
Connections to outlet pipe are water tight;
structure repaired or replaced and works
as designed.
Any holes—other than designed holes—in the structure. Structure has no holes other than designed holes.
Cleanout Gate Damaged or missing
cleanout gate
Cleanout gate is missing. Replace cleanout gate.
Cleanout gate is not watertight. Gate is watertight and works as designed.
Gate cannot be moved up and down by
one maintenance person.
Gate moves up and down easily and is
watertight.
Chain/rod leading to gate is missing or
damaged.
Chain is in place and works as designed.
Orifice Plate Damaged or missing
orifice plate
Control device is not working properly due
to missing, out of place, or bent orifice
plate.
Plate is in place and works as designed.
Obstructions to orifice
plate
Any trash, debris, sediment, or vegetation
blocking the plate.
Plate is free of all obstructions and works
as designed.
Overflow Pipe Obstructions to
overflow pipe
Any trash or debris blocking (or having the
potential of blocking) the overflow pipe.
Pipe is free of all obstructions and works
as designed.
Deformed or damaged lip of
overflow pipe
Lip of overflow pipe is bent or deformed. Overflow pipe does not allow overflow at an elevation lower than design
Inlet/Outlet Pipe Sediment
accumulation
Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment.
Trash and debris Trash and debris accumulated in
inlet/outlet pipes (includes floatables and
non-floatables).
No trash or debris in pipes.
Damaged inlet/outlet
pipe
Cracks wider than ½-inch at the joint of the
inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet
pipes.
No cracks more than ¼-inch wide at the
joint of the inlet/outlet pipe.
Metal Grates
(If applicable)
Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design standards.
Trash and debris Trash and debris that is blocking more than 20% of grate surface. Grate free of trash and debris.
Damaged or missing
grate
Grate missing or broken member(s) of the
grate.
Grate is in place and meets design
standards.
Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in
place. Any open structure requires urgent maintenance.
Cover/lid protects opening to structure.
Locking mechanism
not working
Mechanism cannot be opened by one
maintenance person with proper tools.
Bolts cannot be seated. Self-locking cover/lid does not work.
Mechanism opens with proper tools.
Cover/lid difficult to
remove
One maintenance person cannot remove
cover/lid after applying 80 lbs. of lift.
Cover/lid can be removed and reinstalled
by one maintenance person.
NO. 5 – CATCH BASINS AND MANHOLES
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITION WHEN MAINTENANCE
IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Structure Sediment
accumulation
Sediment exceeds 60% of the depth from
the bottom of the catch basin to the invert
of the lowest pipe into or out of the catch basin or is within 6 inches of the invert of
the lowest pipe into or out of the catch
basin.
Sump of catch basin contains no sediment.
Trash and debris Trash or debris of more than ½ cubic foot which is located immediately in front of the
catch basin opening or is blocking capacity
of the catch basin by more than 10%.
No Trash or debris blocking or potentially blocking entrance to catch basin.
Trash or debris in the catch basin that exceeds 1/3 the depth from the bottom of
basin to invert the lowest pipe into or out of
the basin.
No trash or debris in the catch basin.
Dead animals or vegetation that could generate odors that could cause
complaints or dangerous gases (e.g.,
methane).
No dead animals or vegetation present within catch basin.
Deposits of garbage exceeding 1 cubic
foot in volume.
No condition present which would attract or
support the breeding of insects or rodents.
Damage to frame
and/or top slab
Corner of frame extends more than ¾ inch
past curb face into the street (If
applicable).
Frame is even with curb.
Top slab has holes larger than 2 square inches or cracks wider than ¼ inch. Top slab is free of holes and cracks.
Frame not sitting flush on top slab, i.e.,
separation of more than ¾ inch of the
frame from the top slab.
Frame is sitting flush on top slab.
Cracks in walls or bottom Cracks wider than ½ inch and longer than 3 feet, any evidence of soil particles
entering catch basin through cracks, or
maintenance person judges that catch basin is unsound.
Catch basin is sealed and is structurally sound.
Cracks wider than ½ inch and longer than
1 foot at the joint of any inlet/outlet pipe or
any evidence of soil particles entering
catch basin through cracks.
No cracks more than 1/4 inch wide at the
joint of inlet/outlet pipe.
Settlement/
misalignment
Catch basin has settled more than 1 inch
or has rotated more than 2 inches out of
alignment.
Basin replaced or repaired to design
standards.
Damaged pipe joints Cracks wider than ½-inch at the joint of the inlet/outlet pipes or any evidence of soil
entering the catch basin at the joint of the
inlet/outlet pipes.
No cracks more than ¼-inch wide at the joint of inlet/outlet pipes.
Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or
paint.
Materials removed and disposed of according to applicable regulations. Source
control BMPs implemented if appropriate.
No contaminants present other than a
surface oil film.
Inlet/Outlet Pipe Sediment accumulation Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of sediment.
Trash and debris Trash and debris accumulated in
inlet/outlet pipes (includes floatables and
non-floatables).
No trash or debris in pipes.
NO. 5 – CATCH BASINS AND MANHOLES
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITION WHEN MAINTENANCE
IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Inlet/Outlet Pipe
(cont.)
Damaged inlet/outlet
pipe
Cracks wider than ½-inch at the joint of the
inlet/outlet pipes or any evidence of soil
entering at the joints of the inlet/outlet pipes.
No cracks more than ¼-inch wide at the
joint of the inlet/outlet pipe.
Metal Grates
(Catch Basins)
Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design standards.
Trash and debris Trash and debris that is blocking more
than 20% of grate surface.
Grate free of trash and debris.
Damaged or missing grate Grate missing or broken member(s) of the grate. Any open structure requires
urgent maintenance.
Grate is in place and meets design standards.
Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in
place. Any open structure requires urgent maintenance.
Cover/lid protects opening to structure.
Locking mechanism
not working
Mechanism cannot be opened by one
maintenance person with proper tools.
Bolts cannot be seated. Self-locking cover/lid does not work.
Mechanism opens with proper tools.
Cover/lid difficult to
remove
One maintenance person cannot remove
cover/lid after applying 80 lbs. of lift.
Cover/lid can be removed and reinstalled
by one maintenance person.
NO. 6 – CONVEYANCE PIPES AND DITCHES
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITIONS WHEN
MAINTENANCE IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Pipes Sediment & debris
accumulation
Accumulated sediment or debris that
exceeds 20% of the diameter of the pipe.
Water flows freely through pipes.
Vegetation/root
growth in pipe
Vegetation/roots that reduce free
movement of water through pipes.
Water flows freely through pipes.
Contaminants and
pollution
Any evidence of contaminants or pollution
such as oil, gasoline, concrete slurries or
paint.
Materials removed and disposed of
according to applicable regulations. Source
control BMPs implemented if appropriate.
No contaminants present other than a surface oil film.
Damage to protective
coating or corrosion
Protective coating is damaged; rust or
corrosion is weakening the structural
integrity of any part of pipe.
Pipe repaired or replaced.
Damaged pipes Any dent that decreases the cross section
area of pipe by more than 20% or is
determined to have weakened structural
integrity of the pipe.
Pipe repaired or replaced.
Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 square feet of ditch and slopes. Trash and debris cleared from ditches.
Sediment
accumulation
Accumulated sediment that exceeds 20%
of the design depth.
Ditch cleaned/flushed of all sediment and
debris so that it matches design.
Noxious weeds Any noxious or nuisance vegetation which may constitute a hazard to City personnel
or the public.
Noxious and nuisance vegetation removed according to applicable regulations. No
danger of noxious vegetation where City
personnel or the public might normally be.
Contaminants and pollution Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or
paint.
Materials removed and disposed of according to applicable regulations. Source
control BMPs implemented if appropriate.
No contaminants present other than a
surface oil film.
Excessive vegetation growth Vegetation that reduces free movement of water through ditches. Water flows freely through ditches.
Erosion damage to
slopes
Any erosion observed on a ditch slope. Slopes are not eroding.
Rock lining out of place or missing (If
applicable)
One layer or less of rock exists above native soil area 5 square feet or more, any
exposed native soil.
Replace rocks to design standards.
NO. 12 – ACCESS ROADS
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITION WHEN MAINTENANCE
IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Site Trash and debris Trash and debris exceeds 1 cubic foot per
1,000 square feet (i.e., trash and debris
would fill up one standards size garbage can).
Roadway drivable by maintenance
vehicles.
Debris which could damage vehicle tires or
prohibit use of road.
Roadway drivable by maintenance
vehicles.
Contaminants and
pollution
Any evidence of contaminants or pollution
such as oil, gasoline, concrete slurries or paint.
Materials removed and disposed of
according to applicable regulations. Source control BMPs implemented if appropriate.
No contaminants present other than a
surface oil film.
Blocked roadway Any obstruction which reduces clearance above road surface to less than 14 feet. Roadway overhead clear to 14 feet high.
Any obstruction restricting the access to a
10- to 12 foot width for a distance of more
than 12 feet or any point restricting access to less than a 10 foot width.
At least 12-foot of width on access road.
Road Surface Erosion, settlement,
potholes, soft spots,
ruts
Any surface defect which hinders or
prevents maintenance access.
Road drivable by maintenance vehicles.
Vegetation on road surface Trees or other vegetation prevent access to facility by maintenance vehicles. Maintenance vehicles can access facility.
Shoulders and
Ditches
Erosion Erosion within 1 foot of the roadway more
than 8 inches wide and 6 inches deep.
Shoulder free of erosion and matching the
surrounding road.
Weeds and brush Weeds and brush exceed 18 inches in height or hinder maintenance access. Weeds and brush cut to 2 inches in height or cleared in such a way as to allow
maintenance access.
Modular Grid
Pavement
Contaminants and
pollution
Any evidence of contaminants or pollution
such as oil, gasoline, concrete slurries or paint.
Materials removed and disposed of
according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a
surface oil film.
Damaged or missing
blocks/grids
Access surface compacted because of
broken on missing modular block.
Access road surface restored so road
infiltrates.
NO. 38 – SOIL AMENDMENT BMP
MAINTENANCE
COMPONENT
DEFECT OR
PROBLEM
CONDITIONS WHEN
MAINTENANCE IS NEEDED
RESULTS EXPECTED WHEN
MAINTENANCE IS PERFORMED
Soil Media Unhealthy vegetation Vegetation not fully covering ground
surface or vegetation health is poor.
Yellowing: possible Nitrogen (N)
deficiency. Poor growth: possible
Phosphorous (P) deficiency. Poor
flowering, spotting or curled leaves, or
weak roots or stems: possible Potassium
(K) deficiency.
Plants are healthy and appropriate for site
conditions
Inadequate soil
nutrients and
structure
In the fall, return leaf fall and shredded
woody materials from the landscape to the
site when possible
Soil providing plant nutrients and structure
Excessive vegetation
growth
Grass becomes excessively tall (greater
than 10 inches); nuisance weeds and other
vegetation start to take over.
Healthy turf- “grasscycle” (mulch-mow or
leave the clippings) to build turf health
Weeds Preventive maintenance Avoid use of pesticides (bug and weed
killers), like “weed & feed,” which damage
the soil
Fertilizer needed Where fertilization is needed (mainly turf
and annual flower beds), a moderate
fertilization program should be used which
relies on compost, natural fertilizers or
slow-release synthetic balanced fertilizers
Integrated Pest Management (IPM)
protocols for fertilization followed
Bare spots Bare spots on soil No bare spots, area covered with
vegetation or mulch mixed into the
underlying soil.
Compaction Poor infiltration due to soil compaction
To remediate compaction, aerate
soil, till to at least 8-inch depth, or
further amend soil with compost and re-till
If areas are turf, aerate compacted
areas and top dress them with 1/4 to
1/2 inch of compost to renovate them
If drainage is still slow, consider
investigating alternative causes (e.g.,
high wet season groundwater levels,
low permeability soils)
Also consider site use and protection
from compacting activities
No soil compaction
Poor infiltration Soils become waterlogged, do not appear
to be infiltrating.
Facility infiltrating properly
Erosion/Scouring Erosion Areas of potential erosion are visible Causes of erosion (e.g., concentrate flow
entering area, channelization of runoff)
identified and damaged area stabilized
(regrade, rock, vegetation, erosion control
matting).For deep channels or cuts (over 3
inches in ponding depth), temporary
erosion control measures in place until
permanent repairs can be made
Grass/Vegetation Unhealthy vegetation Less than 75% of planted vegetation is
healthy with a generally good appearance.
Healthy vegetation. Unhealthy plants
removed/replaced. Appropriate vegetation
planted in terms of exposure, soil and soil
moisture.
Noxious Weeds Noxious weeds Listed noxious vegetation is present (refer
to current County noxious weed list).
No noxious weeds present.
Sophie Jo Short Plat - Stormwater Facility Maintenance Program
APPENDIX II
MANUFACTURER MAINTENANCE GUIDE FORMS
Introduction
This manual is designed to provide you with comprehensive guidance on how to inspect and
maintain your RainVault system effectively.
System Overview
RainVault is an innovative underground stormwater detention system designed to capture and
temporarily store excess stormwater runoff. In most designs your RainVault system will operate
normally without any attention or operational requirements from you. But keeping it in good running
order will require regular inspection and occasional maintenance.
Safety Precautions
Before conducting any inspection or maintenance procedures, ensure to adhere to the following
safety precautions:
• Always wear appropriate personal protective equipment (PPE) such as gloves and safety
glasses.
• Use caution around openings or access points to prevent falls or injuries.
• Observe Conflned Space requirements and other applicable local or OSHA regulations.
• If working in an active traffic area, block off the areas where you’ll need to access for
inspection or maintenance activities.
Inspection Procedures
Regular inspections are essential to ensure the optimal performance of your RainVault system.
Inspections should occur quarterly during the flrst year of operation, and every 6-12 months
throughout the system’s life. (Base the inspection intervals on observations made during the flrst
year’s inspections.)
• INLET
o Check all inlet structures and connecting pipes that contribute runoff to the system,
looking for blockages, debris, or collected sediment.
o Check all pre-treatment structures and take measurements of collected sediment.
Operation and Maintenance Manual for
o If possible, visually inspect all inlet pipes where they connect to the RainVault
• RAINVAULT
o Open all observation ports to check for collected sediment, and take depth
measurements where applicable.
o If your system was designed with a First Flush Filter (F3), pay extra attention to these
areas, as they were designed to collect the bulk of sediment and debris.
• OUTLET
o Inspect the outlet structure (where applicable) for sediment and debris.
o Ensure the outlet oriflce (where applicable) is free of blockages.
o If the outlet daylights into a natural waterway, check for signs of erosion or other
degradation.
• DOCUMENTATION
o Record your inspection flndings, including photos and descriptions of any issues or
observations.
o Be sure to include a date in your report
Maintenance
If excessive sediment or debris is found in your RainVault System, maintenance will be required.
• Using the inspection report as your guide, access all areas where sediment or debris was
documented and should be removed
• Standard jet-vac equipment is recommended
• INLET
o Block the inlet pipe to the RainVault
o Begin by cleaning any proprietary pre-treatment systems as required by the
manufacturer’s recommendations
o Flush all other inlet structures and pipes toward the flnal structure prior to the
RainVault (where you blocked off the pipe leading to the RainVault)
o Vacuum material from this structure as needed
o Open inlet pipe to RainVault when complete
• RAINVAULT
o If an F3 was designed in your system, work from the structure closest to the
RainVault and run jetting equipment into the RainVault to fiush sediment and debris
back into the inlet.
o If sediment was reported in the observation ports OUTSIDE OF THE F3, vacuum
what can be reached and mobilize other sediment toward the outlet by injecting
water through the port.
• OUTLET
o Move to the outlet structure, and run jetting equipment into the RainVault to fiush
sediment and debris back into the outlet structure.
o Remove any sediment or debris from inside the structure that could block the
oriflce.
Contact Information
For inquiries, support, or assistance regarding your RainVault system, please contact:
• ACF West Ripple Stormwater Technologies
• 800-878-5115 904-763-7632
• stormwater@acfwest.com info@ripplestormwater.com
Conclusion
Regular inspection and maintenance of your RainVault underground stormwater detention system
are crucial for ensuring its longevity and efficient operation. By following the procedures outlined in
this manual, you can effectively manage stormwater runoff and do your part to keep your local
watershed clean. If you have any questions or require further assistance, do not hesitate to contact
the supplier or installer for additional support.
EXHIBIT C – Legal Description
LOT 19, PLAT No. 2 OF RENTON CO-OPERATIVE COAL COMPANY’S ACRE TRACTS,
ACCORDING TO THE PLAT THEREOF RECORDED IN VOLUME 9 OF PLATS, PAGE 27,
RECORDS OF KING COUNTY, WASHINGTON.